CAP1xxx Evaluation Board User's Guideww1.microchip.com/downloads/en/DeviceDoc/50002221A.pdf · The Save/Load tab, located in the lower left corner of the Advanced Tab and shown in

CAP1xxx Evaluation Board User’s Guide

2013 Microchip Technology Inc. DS50002221A-page 1


1 Overview

This document provides a description of the software and hardware used to demonstrate the featuresof the Microchip CAP1xxx Family of RightTouchTM multiple-channel capacitive touch controllers andLED drivers. Two evaluation boards are covered in this User's Manual. The CAP1188 evaluation boardcontains the largest, full-featured version of the CAP11xx family. The other devices in this family arethe CAP1166, CAP1128, CAP1126, CAP1133, and CAP1106. Likewise, the CAP1298 evaluation boardcontains the largest, full-featured version of the CAP12xx family. The other devices in this family arethe CAP1296, CAP1293, CAP1208, CAP1206, and CAP1203.

1.1 References

Readers should be familiar with or have access to the datasheet for the device and the schematic forthe evaluation board.

The datasheet is included with the CD provided with the evaluation board, and can also be downloaded from the Microchip website at http://www.microchip.com/mtouch.

The schematic is included with the CD provided with the evaluation board.

1.2 The RightTouch Evaluation System

The evaluation system has three major parts, as shown in Figure 1.1:

Customer-provided Windows PC

CAP1xxx graphical user interface (GUI) software (based on National InstrumentsTM LabVIEWTM software)

CAP1xxx Evaluation Board - either the CAP1188 or CAP1298 versions (see Figure 1.2)

DS50002221A-page 2 2013 Microchip Technology Inc.


Figure 1.1 CAP1xxx Evaluation System

CAP1188 Device Capacitive Sensors

LED Drivers PIC16F1454

CAP11xx Evaluation

Board

I2C PC

with CAP1xxx GUI

USB

CAP1298 Device Capacitive Sensors

LED Drivers PIC16F1459

CAP12xx Evaluation

Board

I2C PC

with CAP1xxx GUI

USB



1.2.1 Capacitive Sensing Device on the Evaluation Board

The CAP1188 device was chosen for the evaluation board because it has the most sensors and LEDsin the CAP11xx family.

Note: The CAP1114 and CAP1214 devices, each with 14 sensors and 11 LED drivers, containadditional features such as slider support which will be highlighted in their own evaluationboard.

The CAP1298 device was chosen for the evaluation board because it is the superset device in thefamily, meaning it has the most sensors and features in the CAP12xx family including the signal guard.

The CAP1188, CAP1166, CAP1128, CAP1126, CAP1133, and CAP1106 are similar, with the exceptionof the number of capacitive sensor inputs and LED drivers, as shown in Table 1.1.

Figure 1.2 CAP1xxx Evaluation Board Top View



The CAP1298, CAP1296, CAP1293, CAP1208, CAP1206, and CAP1203 part of the same family andso have a very similar feature set, with the major exception being of the number of capacitive sensorinputs and the guard output, as shown in Table 1.2.

1.2.2 Major Components on the Evaluation Board

Figure 1.3 shows the component side of the CAP1188 evaluation board and highlights some of theimportant components.

Table 1.1 CAP11xx Device Differentiation

DEVICE NUMBER OF LED DRIVERS NUMBER OF CAPACITIVE SENSOR INPUTS

CAP1133 3 3

CAP1106 0 6

CAP1126 2 6

CAP1166 6 6

CAP1128 2 8

CAP1188 8 8

Table 1.2 CAP12xx Family Device Differentiation

DEVICE NUMBER OF CAPACITIVE SENSORS GUARD

CAP1203 3 No

CAP1293 3 Yes

CAP1206 6 No

CAP1296 6 Yes

CAP1208 8 No

CAP1298 8 Yes



Figure 1.3 Evaluation Board Component Side View

PIC16F1455

USB

5V to 3.3V Regulator

PIC16F1455 Programming

Header CAP1188

8-pin Communication

Header

PIC16F1459

USB

PIC16F1459 Programming

Header CAP1298

8-pin Communication

Header



2 Software and Hardware Installation

To begin using the CAP1xxx evaluation board, you only need to supply power by plugging in the USBconnector. However, in order to further evaluate the features of the CAP device, the CAP1xxx GUImust be installed on a Windows-based computer with a USB port.

2.1 GUI Software Installation

Begin by inserting the CD provided with the evaluation board into the computer. Run the Setup.exeprogram located in the root directory of the CD. This steps through the CAP1xxx GUI installation, whichtakes less than a minute. Figure 2.1 shows the initial installation screen, which displays briefly as thesetup program loads.

Figure 2.1 Software Installation Step 1



Click Next in the Destination Directory window, shown in Figure 2.2. For proper operation, the filesmust be installed in the default locations. The default location for the software files is C:\ProgramFiles\Microchip\Microchip CAP1xxx GUI and for the LabVIEWTM software is C:\Program Files\NationalInstruments.

In order to use the LabVIEWTM software, the license agreement must be accepted (see Figure 2.3).





Follow the on-screen instructions to complete the installation. During installation, shortcuts will becreated on the Windows Start Menu and on the desktop. When installation is complete, the programwill automatically run and begin looking for the PIC16F145x USB to I2C bridge. (see Figure 2.4).

Figure 2.4 RightTouch Evaluation Software Start-up Screen



2.2 USB Bridge Installation

To complete the installation, connect the USB mini connector to the EVB and the standard USBconnector to any available USB port on the PC. If the USB Bridge driver has not previously beeninstalled on the selected USB port, the “Find New Hardware” wizard will pop up on the PC’s screen.Follow the on-screen instructions to complete the installation process. See Figure 2.5 throughFigure 2.8 for a step by step view of the installation.

Once installation of the USB Bridge is complete, the GUI software will begin communications with thedevice on the EVB.

Figure 2.5 USB Bridge Driver Installation Step 1










3 Quick Start Window

The Quick Start Window provides the same information as the Advanced Window, but reduces thenumber of options for a more manageable initial user experience. For more information on whatoptions are provided on the Quick Start Window and how to use them, refer to the CAP1xxx QuickStart Guide provided with the CAP1xxx CD.

4 Advanced Tab

4.1 Default Conditions

Communications begin as soon as the CAP1xxx GUI software detects the presence of the CAP1xxxevaluation board. The GUI then reconfigures the CAP1xxx evaluation board with predetermined valuesspecific to the evaluation board's hardware. Figure 4.1 shows the default GUI for the CAP1188evaluation board.

Figure 4.1 Default State of RightTouch GUI with the CAP1188 Evaluation Board



4.2 Tips for Using the RightTouch Evaluation System

For many items on the GUI control panels, the register address is listed after the control name.

After communications are established between the GUI and the evaluation board, the GUI will reconfigure the device. Users can save setting configurations to user-named files which can be reloaded at any time for quick re-configuration (see Section 4.4, "Save/Load Tab").

QuickLoad options are provided on the right to quickly change the evaluation board's behavior between 'Buttons', 'Proximity', and 'Metal over Capacitive'.

4.2.1 Numbering Systems Views

Some control panels allow values to be displayed using different numbering systems: Decimal, Hex,Octal, Binary or SI Notation.

To view a value using a different numbering system, click the indicator to the left of the value in thecell, shown circled in Figure 4.2.

4.2.2 Keyboard Shortcuts

Some GUI controls have keyboard shortcuts, as shown in Table 4.1.

4.3 Device Information and Datasheet Link

In addition to the device name lighting up on the evaluation board and displaying in the software titlebar, the Device Information Control Panel also shows the device that has been populated on the

Figure 4.2 Numbering System Indicators

Table 4.1 CAP1188 Family EVB GUI Keyboard Shortcuts

GUI CONTROL SHORTCUT CONTROL DESCRIPTION

Run CTRL + R Section 4.5.1, "Stop and Run Buttons"

Load Buttons file F1 Section 4.5.5, "QuickLoad Buttons"

Load Proximity file F2 Section 4.5.5, "QuickLoad Buttons"

Load MOC file F3 Section 4.5.5, "QuickLoad Buttons"

Load Custom1 file F4 Section 4.5.5, "QuickLoad Buttons"

Load Custom2 file F5 Section 4.5.5, "QuickLoad Buttons"

Load Defaults F6 Section 4.5.6, "Defaults Button"

Update All Registers F7 Section 4.5.4, "Update All Registers"

Calibration Activate All F8 Section 4.9, "Sensitivity Control Panel"

Stop F12 Section 4.5.1, "Stop and Run Buttons"



evaluation board. Figure 4.3 shows the Device Information Control Panel for the CAP1188 evaluationboard.. This control panel also shows the values from reading the Product ID Register (FDh) andRevision Register (FFh) on the device.

Clicking the Datasheet button opens a browser window that will display a PDF file of the datasheet ofthe connected device.

4.4 Save/Load Tab

The Save/Load tab, located in the lower left corner of the Advanced Tab and shown in Figure 4.4,allows the user to save all the settings that have been configured for the device to allow quick re-configuration at any time.

Figure 4.3 Device Information Control Panel



To save device configuration settings:

Using the GUI, configure the CAP1xxx as desired.

Select the Save/Load tab.

Type in a path, or click the folder icon to browse to your desired save location.

Click the 'SAVE' switch to store the configuration.

Notes:

1. The file should be named with the extension '.txt' or similar plain-text file format. The data is savedin two columns separated by tabs. The first column is the register's address, and the secondcolumn is the register's value.

2. If a file with the same name already exists, the file will be overwritten and old data will be lost.

3. When a file is loaded, the Auto Clear INT button is disabled. Click it to re-enable auto-clearing ofinterrupts (see Section 4.5.2, "Auto Clear INT").

Once a file is saved, it can be recalled at any time by selecting the file in the data path window andclicking the “LOAD” switch. The file can also be linked to a QuickLoad button (see Section 4.5.5,"QuickLoad Buttons").

Figure 4.4 Save/Load Tab



The evaluation board GUI comes with several sample configuration files which vary the settings fordifferent functions.

4.5 Communications Status and Control Panel

Along the right side of the GUI is the control panel shown in Figure 4.5. This is the CommunicationsStatus and Control Panel, which controls and displays the status of the communications between theGUI software and the evaluation board and includes buttons for loading configurations. This controlpanel is always displayed.

Figure 4.5 Communications Status and Control Panel



4.5.1 Stop and Run Buttons

The STOP button, on the Panel shown in Figure 4.5, halts GUI software communication with theevaluation board. When this button is clicked, the Run button, which has an arrow on it, displays belowthe menu bar, as shown in Figure 4.6.

To restart communications between the software and the evaluation board, click the Run button. Thearrow button disappears when communications resume.

To close the program, use the red X in the upper right corner of the window.

4.5.2 Auto Clear INT

When the Auto Clear INT button is enabled (dark gray), the INT bit, ALERT pin, and status indicatorsare continuously cleared. When the Auto Clear INT button is disabled (light gray), the user mustmanually clear interrupts by clicking the INT indicator on the Status and Control Panel or the Auto ClearINT button. This is shown in Figure 4.5 at the top of the red highlighted box.

4.5.3 Deep Sleep Indicator

The Deep Sleep indicator located below the Auto Clear INT toggle switch in the upper right and shownin Figure 4.5, indicates whether the device is in the Deep Sleep state. During normal operation, thisindicator is dark. When the device is placed into the Deep Sleep state, this indicator turns blue (or alighter color, depending on the PC settings).

4.5.4 Update All Registers

The Update All Registers button shown in Figure 4.5, will update all values displayed on the GUIcontrol panels to reflect the current device registers. In order to keep control panel response timereasonable, only a few of the device registers are read and continuously updated during normaloperation. Clicking the Update All Registers button will automatically cycle refreshing all controls andreadings on the control panel.

The keyboard shortcut is F7.

Figure 4.6 Run Button



4.5.5 QuickLoad Buttons

The QuickLoad buttons, on the Panel shown in Figure 4.5, allow the user to quickly load configurationfiles (see Section 4.4, "Save/Load Tab").

There are five QuickLoad buttons available. Each button is linked to a “.txt” file in your installationdirectory that has the filename listed above the button. To link the button to a different file, type thefilename (without the extension) in the box above the button, then click off the field. Figure 4.7 showsnew names for the first two buttons. To load the file, click the button or press the shortcut key listednext to the button.

The 'Buttons' QuickLoad option will set up the CAP1xxx evaluation board for each sensor to behaveas normal touch buttons. Due to the thin front cover of the evaluation boards, this means the gain isset to the lowest option, and the sensitivity option is greatly reduced from the maximum.

The 'Proximity' QuickLoad option will set up the CAP1xxx evaluation board for all of the sensors todetect the proximity of a hand approaching. The gain and sensitivity, in this case, are set very high.Using this configuration, you can see how the size of the sensors will affect the possible range ofproximity detection.

4.5.6 Defaults Button

The Defaults button, toward the bottom of the red highlighted panel shown in Figure 4.5, loads thedefault register settings on the device as described in the datasheet.

The keyboard shortcut is F6.

Figure 4.7 QuickLoad Buttons



4.5.7 COM Indicator

The COM indicator, toward the bottom of the Panel shown in Figure 4.5, indicates the status ofcommunications over the I2C. During normal operation, the COM indicator is dark. If I2Ccommunications fail, the COM indicator turns red.

4.5.8 I2C Address

I2C Address, at the bottom of the red highlighted panel shown in Figure 4.5, indicates the 2C addressof the device.

4.6 Delta Counts Tab

The Delta Counts tab on the Main window and in the Quick Start window shown in Figure 4.8, displaysthe delta counts of the capacitive sensor channels. The Delta Count Register address for each sensorinput is listed below the sensor number.

When the Display Value switch is set to Delta, the number cell below each indicator bar displays theleast significant byte of that channel’s current delta count. When the Display Value switch is set to Max,

Figure 4.8 Delta Counts Tab



the number cell below each indicator bar displays the max delta count for the channel (when the MaxEnable switch is up). The outline on the top of each indicator bar shows the threshold of the sensorchannel. As a sensor pad is being approached and touched, a black bar displays the actual deltacount.

The Max Enable switch, when set in the upper position, turns on display of thin blue bars that indicatethe maximum delta count for each channel. These bars display the maximum delta count until the MaxEnable switch is set to the lower, “Clear” position.

Settings that control the threshold values are covered in Section 4.9, "Sensitivity Control Panel".

All numbers (except register addresses) on this tab are displayed in decimal format.

4.7 Base Counts Tab

The Base Counts tab on the Main window, shown in Figure 4.9, displays Base, Delta, Current Count,Calibration Factor, and Capacitance in a register format and includes a Sensitivity control. This tab canbe used to check the sensors' calibration values.

Figure 4.9 Base Counts Tab



The formats of values on this control panel can be changed to Hexadecimal, Octal, Binary or SINotation by clicking the tap in the front of each data cell (see Section 4.2.1, "Numbering SystemsViews").

The Sensitivity Control section affects the Sensitivity Control Register (1Fh). The Base Shift controlsthe scaling and data presentation of the Base Count registers. The higher the value of these bits, thelarger the range and the lower the resolution of the data presented. It should not be necessary tomodify this number.

The Sensitivity drop-down list allows update of the sensitivity multiplier, which controls sensitivity of atouch detection. This value can also be updated using the Sensitivity bar in the Sensitivity ControlPanel (see Figure 4.11, "Sensitivity Control Panel").

4.8 Register Data Tab

The Register Data tab in the Advanced window shown in Figure 4.10, displays a list of all registersand allows the user to directly write to any register of the device.

The All Raw Device Registers display shows a scrollable list of registers and their current values. It isimportant to note that not all addresses are physical memory locations on the device; these registerswill read “0”. Likewise, some registers shown that are undocumented in the datasheet may have data.

Figure 4.10 Raw Data Tab



Editing these registers can cause unexpected results. If a mistake is made while making a manual editin this window, it may be necessary to revert to the defaults or a stored configuration.

The Single Byte Register Access control allows direct write to any register within the device.

The formats of address and data on this control panel are hexadecimal by default, with the option tochange to Decimal, Octal, Binary or SI Notation (see Section 4.2.1, "Numbering Systems Views").

4.9 Sensitivity Control Panel

The Sensitivity Control Panel provides controls for capacitive sensor input sensitivity and on-demandcalibration, as shown in Figure 4.11.

The Sensitivity bar affects the Sensitivity Control Register (1Fh), which controls the amount ofcapacitance change required to affect the sensor's signal.. Clicking the bar changes the setting. Thevalue selected is also reflected in the Sensitivity cell on the Base Counts Tab.

Occasionally it is desirable to force recalibration of the sensor inputs. Clicking the Calibration Activateswitch will recalibrate the sensor inputs.

Note: This is equivalent to writing 0xFF to the Calibration Activate register (26h).

Figure 4.11 Sensitivity Control Panel



4.10 Thresholds Control Panel

The Thresholds Control Panel, shown in Figure 4.12, contains 4 tabs which are described below.

4.10.1 Active Tab

The Active tab of the Advanced window's Thresholds section, shown in Figure 4.12, contains thesensor input thresholds (registers 30h - 37h) that define the delta count level at which touches arereported when the device is in the Fully Active state.

To quickly set all Active tab sensor input thresholds to the same value, ensure the 'Sensor 1 UpdatesAll' switch is in the up position, enter the desired value into the Sensor 1 data cell, and then click outof the cell. To individually set Active tab sensor input thresholds, click the 'Sensor 1 Updates All' switchso it’s in the down position and displays the label “Individual Sensor Updates”.

4.10.2 Standby Tab

The Standby tab of the Advanced window's Thresholds section shown in Figure 4.13, contains sensorinput controls for the Standby power state.

Figure 4.12 Thresholds Control Panel - Active Tab Displayed



The Standby Threshold defines the delta count threshold level for all sensor inputs when the device isin the Standby state. There is also a Standby Sensitivity bar that affects the Standby SensitivityRegister (42h).

Figure 4.13 Thresholds Control Panel - Standby Tab Displayed



4.10.3 Noise Tab

The Noise tab of the Main window's Thresholds section shown in Figure 4.14, contains the thresholdused to detect noise. The Sensor Noise Thresholds are a percentage of the Sensor Thresholds on theActive tab.

Figure 4.14 Thresholds Control Panel - Noise Tab Displayed



4.11 Recalibration Configuration Control Panel

On the Advanced window below the Thresholds section is the Recalibration Configuration sectionshown in Figure 4.15.

The 'Calibration #samples / time' drop-down menu allows selection of the update time and number ofsamples related to the recalibration routine. Negative delta count allows selection of the number ofconsecutive negative delta counts necessary to trigger a digital recalibration. Both of these controlsaffect the Recalibration Configuration Register (2Fh).

Figure 4.15 Recalibration Configuration Control Panel



4.12 Status and Control Panel

The Status and Control section of the Main window shown in Figure 4.16, displays the current SensorStatus register value and the General Status register. It also provides control and display of the deviceinterrupt, power states, and advanced configuration options.

When the sensor's signal exceeds the threshold, the Sensor Status section will change thecorresponding square button to a dark square. Depending on configuration settings, indicators in theGeneral Status section may turn blue (or a lighter color, depending on the PC settings) when thecriteria for the indicator is met.

If the Auto Clear INT button on the Panel (see Section 4.5, "Communications Status and ControlPanel") is enabled (dark gray), the INT indicator, General Status section, and the Sensor Status sectionare continuously cleared. This allows the user to see only the current state of the device.. If the AutoClear INT button is disabled (light gray), the user must manually clear interrupts by clicking the INTindicator or the Auto Clear INT button. This allows for a more realistic demonstration of the behaviorof the device's registers between host reads and writes of the INT bit.

Figure 4.16 Status and Control Panel



4.12.1 Power States

Please refer to the device datasheet for details regarding the different power states. The softwareswitches work as follows:

The Standby switch toggles between the Standby and Fully Active states.

The Deep Sleep switch puts the device into the Deep Sleep state. To exit Deep Sleep, click anywhere on the GUI to display the message shown in Figure 4.17. There is also a timeout that will display the message shown in Figure 4.18.

4.12.2 Configuration and Configuration 2

The Configuration section of 'Status and Control' allows the user to enable and disable bits in theConfiguration Register (20h). The Configuration 2 section allows the user to enable and disable bits inthe Configuration 2 Register (44h). These registers control the general global functionality of thedevice. Refer to the datasheet for details.

Figure 4.17 Deep Sleep Message

Figure 4.18 Deep Sleep Timeout Message



4.13 Sensor Configuration Control Panel

The Sensor Configuration section shown in Figure 4.19, allows the user to adjust the configurationregisters for the sensors. These controls change the response of the sensors to suit the environment,application, and desired response in the Fully Active and Standby states.

The Sensor Configuration section contains options for the Averaging and Sampling ConfigurationRegister (24h), which adjust the averaging and cycle time for sensor inputs that are active in the FullyActive state. The Standby Tab controls affect the Standby Configuration Register (41h), which controlsaveraging and cycle time for sensor inputs that are active in the Standby state.

Controls in the Sensor Configuration section affect the Sensor Configuration Register (22h). Repeatrate settings determine whether one or more interrupts are sent per sensor activation and the durationbetween interrupts. Maximum duration settings determine maximum time a sensor can be activatedbefore the sensor input is recalibrated.

The M Press control affects the Sensor Configuration 2 Register (23h). The M Press setting delineatesthe time duration difference between a touch versus a press-and-hold event. If the press is longer thanthe M Press time, it is considered a press-and-hold.

Figure 4.19 Sensor Configuration Control Panel



Controls in the Multiple Touch section affect the Multiple Touch Configuration Register (2Ah). Multipletouch settings determine how simultaneous touches to multiple buttons .are handled. Remember tocheck the 'Multiple Block Enable' box to enable this feature. In the actual device, the 'enable' bit mustalso be set in the register to enable the feature.

Controls in the Repeat Rate Enable section affect the Repeat Rate Enable Register (28h). Whenchecked, the repeat rate defined in the Sensor Configuration section is enabled for the button.



5 GUI Sensor Control Tab

The Sensor Control tab provides the detailed controls for individual sensor inputs. Figure 5.1 showsthe default view for the CAP1298 Evaluation Board.

The Sensor Control Panel has 2 sections: individual sensor inputs (see Section 4.1) and all sensorinputs (see Section 5.1).

5.1 All Sensor Input Settings

The All Sensor Settings display, shown in Figure 5.2, has the controls for all the sensor inputs. A checkmark represents a ‘1’ in logic.

The 'Sensor Enable' column determines which sensors are scanned in Active mode.

The 'Sensor Interrupt' column determines which sensors produce an interrupt when a touch isdetected.

Figure 5.1 Sensor Control Tab for the CAP1188 Evaluation Board



The 'Standby Channel' column determines which sensors are scanned in Standby mode. For theCAP12xx devices, this also determines which sensors will be scanned using the Combo Gain settingswhen in Combo mode.

The 'Signal Guard Enable' column is only available on CAP129x devices and determines whichsensors will have the signal guard enabled during their scan.

Figure 5.2 All Sensor Settings



5.2 Multiple Touch Pattern Settings

5.2.1 MTP Tab

The MTP tab of the Main window's Thresholds section shown in Figure 5.3, contains multiple touchpattern configuration controls. The MTP Thresholds are a percentage of the Sensor Thresholds on theActive tab.

5.3 Extended Calibration Ranges

When using a CAP129x device, the Sensor Control window will display an Extended Calibrationsection, shown in Figure 5.1, for choosing the calibration sensitivity settings for each sensor. Thisallows the user to reduce the internal capacitance used while generating the sensing waveform (whichwill increase sensitivity), but the sensor must fall within the selected capacitance range or it will notcalibrate.

Figure 5.3 Multiple Touch Pattern Options



5.4 Power Button

When using a CAP12xx device, the Sensor Control window will display a Power Button section, shownin Figure 5.1, for enabling a sensor to have a delay before registering a press. This allows systems toforce the user to press for an extended period to verify that a critical action was meant to be performed.For example: if this is used to power on and off the application, setting a minimum press period withthese options minimizes the chance of a user accidentally pressing the sensor.



6 GUI LED Control Tab

The LED Control tab provides the detailed controls for the LEDs. Figure 6.1 shows the default viewfor the CAP1188 evaluation board.

The CAP12xx devices do not have LED drivers, so this window will not contain any options. The LEDson the evaluation board are being driven by the PIC16F145x microcontroller.an EVB using theCAP1188 device.

The LED Control Panel has 3 sections: individual (see Section 6.1), all (see Section 6.3), LED behaviorconfiguration (see Section 6.4), and graphs.

6.1 Individual LED Settings

To access individual LED controls, click the respective LED button on the left side of the control panelor use the scroll switch above the buttons. The control panel will then display controls for the selectedLED. Figure 6.2 shows the control panel after the 'LED 1' button was clicked.

Figure 6.1 LED Control Tab for the CAP1188 Evaluation Board



6.2 LED Status

An indicator in the LED Status section changes color when the LED behavior has completed its cycleand the LED is in host control mode. The indicator for an LED is disabled when the LED is linked toa sensor.

If the Auto Clear INT button on the Panel (see Section 4.5, "Communications Status and ControlPanel") is enabled (dark gray), the LED Status indicators are continuously cleared. If the Auto ClearINT button is disabled (light gray), the user must manually clear interrupts by clicking the Auto ClearINT button or the INT indicator on the Main Tab (Section 4.12, "Status and Control Panel").

Figure 6.2 Individual LED Settings



6.3 All LED Settings

The 'All LED Settings' display, shown in Figure 6.3, displays a view of the LED controls for all the LEDs.A check mark represents a ‘1’ in logic.

Note: This control panel does not include LED behavior. Use the individual settings panels instead.

Figure 6.3 All LED Settings



6.4 LED Behavior Configuration Control Panel

The LED Behavior Configuration Control Panel, shown in Figure 6.4, provides controls for the 4different types of behaviors available to the LED drivers.

Figure 6.4 LED Behavior Configuration Control Panel



The graphs, shown in Figure 6.5, at the bottom of the LED Control tab display of how the behaviorswill look based on the selections.

Controls in the LED Pulse and Breathe Duty Cycles section affect the LED Duty Cycles Registers (90h- 93h). Controls in the LED Pulse Periods section affect the LED Period Registers (84h - 86h). Controlsin the LED Behavior Configuration section affect the LED Configuration Register (88h).

The LED Pulse1 Response Graph reflects the settings selected for the Pulse 1 behavior (MaximumPulse 1, Minimum Pulse 1, Pulse 1 Period, and Pulse 1 Count). The LED Pulse2 Response Graphreflects settings selected for Pulse 2 behavior.

Controls in the LED Direct Rates section affect the LED Direct Ramp Rates Register (94h) and LEDOff Delay Register (95h).

The LED Direct Rate Response Graph reflects the settings in the LED Direct Rates section.

Figure 6.5 LED Behavior Configuration Graphs



7 GUI Sensor History Tab

The Sensor History tab displays a graph of sensor delta counts and allows the data to be saved to afile. Figure 7.1 shows the default view for the CAP1xxx evaluation board.

As sensors are touched, delta counts display on the graph..

To save the delta counts over a period of time, ensure the desired path and filename are showing inthe 'All Sensor History Data Path' box. To change this: Manually type in a path, or select the foldericon to browse to the desired folder and file. The file should be named with the extension “.csv”. Oncea file name has been chosen, click the “Save Sensor History” switch so it’s in the up (Saving) position.The software will start logging data into the selected file.

Note 7.1 If a file with the same name already exists, the file will be overwritten and old data will belost.

After generating data for a desired period of time, click the 'Save Sensor History' switch so it’s in thedown (OFF) position (see Figure 7.1).

Figure 7.1 Sensor History Tab for the CAP1xxx Evaluation Board



The data is saved in a .csv format, as shown in Figure 7.2.

Figure 7.2 Sample Sensor_History.csv File



8 Troubleshooting

8.1 GUI Controls Unresponsive After Installation

Restart the computer. In some cases, a restart is required after installation.

8.2 Restore Defaults

To restore defaults, press the F6 key on the keyboard or click the Defaults button (see Section 4.5.6,"Defaults Button"). Alternatively, unplug the USB mini connector from the CAP1xxx evaluation board,then plug it in again.

8.3 Control Panels Freeze

If the control panels freeze for unknown reasons, communications cannot be stopped, and the programcannot be closed, disconnect the USB cable from the CAP1xxx evaluation board, then close theprogram. Reconnect the evaluation board, then restart the CAP1xxx GUI.

8.4 Values in GUI Control Panels Don’t Match Registers

It’s possible that the GUI control panels can get out of sync with the actual register values whendisconnecting and reconnecting the CAP1xxx evaluation board. If this occurs, click the Update AllRegisters button (see Section 4.5.4, "Update All Registers").

8.5 Communications Fail

If the device fails to communicate through the I2C bus, ensure the correct I2C address is displayedon the Communications Status and Control Panel. The CAP11xx evaluation board has a 0 ohm resistorconnected between VDD and the ADDR_COM pin, and the CAP12xx devices have a static addressthat can only be changed at the Microchip Test Facility. So the I2C address should be 28 (50)(0101_000r/w). If an external board has been connected to the evaluation board's 8-pincommunications header, a new address may need to be selected. If communications were stoppedwhen the evaluation board was disconnected, click the Run button (see Section 4.5.1, "Stop and RunButtons").




9 Revision History

Table 9.1 Revision History

REVISION LEVEL & DATE SECTION/FIGURE/ENTRY CORRECTION

CAP1xxx Evaluation Board User’s Guide, Revision A replaces the previous SMSC document RightTouch CAP1188 Family EVB User Manual, Revision 1.0



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• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of ourproducts. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such actsallow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device applications and the like is provided only for your convenience and may besuperseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NOREPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OROTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use ofMicrochip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify andhold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implic-itly or otherwise, under any Microchip intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, dsPIC, FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MTP, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.

Analog-for-the-Digital Age, Application Maestro, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O, Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA and Z-Scale are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

GestIC and ULPP are registered trademarks of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries.

A more complete list of registered trademarks and common law trademarks owned by Standard Microsystems Corporation (“SMSC”) is available at: www.smsc.com. The absence of a trademark (name, logo, etc.) from the list does not constitute a waiver of any intellectual property rights that SMSC has established in any of its trademarks.

All other trademarks mentioned herein are property of their respective companies.

© 2013, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

ISBN: 9781620776230

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV

== ISO/TS 16949 ==


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Documents

CAP1xxx Evaluation Board User's Guideww1.microchip.com/downloads/en/DeviceDoc/50002221A.pdf · The Save/Load tab, located in the lower left corner of the Advanced Tab and shown in